Multiply buffer



MULTIPLY BUFFER March 15 1927' 2 sheets-She@t l Filed Oct-l5' Auk I To@ March 15 1927 F. 1 YERGES MULT IPLY BUFFER Filed oonl, 1923 2 sheets-sheet 2 Hozuml Patented Mar. l5, 19.27;

i UNITEDSTTES Lez-ams vPATE-Nr OFFICE.

FRANK L. YERGES, FREMONT, OHIO, ASSIGNOR F ONE-TENTE TO HARRY ZIMMER- MAN, OF FREMONT, OHIO.l

MULTIPLY BUFFER.

Application led October 15, 1923. Serial No. 668,587.

This invention 'relates to fabric rubbing devices.

This invention has utility when incorporated in ,multipl fabric buffers especially -for billing metalic surfaces, even 1n con-y nection with abrasives. Referring to the drawings Fig. 1 1s a side elevation with parts broken away of an embodimentJ of the invention as a multiply duck or canvas fabric buimg disc; Fi 2 is a fragmentary view on a reduce vscale of a mounting for operating the discs with Fig. 1; Y

Fig. 3 is a fragmentary view of a buiting disc of the type shown in Fig. 1, `but desi ed asa sti er type of construction; 1

ig. 4 is a fragmentary view of a buiiing disc wherein the stitching is extended, but there is still provided a uniform endless series of pockets although the pockets are of somewhat different shape than the pockets of Fig. 1 and Fig. 3;

Fig. 5 is a fragmentary view of a fabric I buiiin disc wherein the stitching is tanenti l g Fig. 6 is a side elevation with parts broken 'awa of an embodiment of the invention simi ar to'Fig. 1, but with the rimaryas- 0 sembling spiral stitching extendlng into the field of the radial stitching;

` Fig. 7 is a fragmentary edge view with arts broken away of an assemblingl of the uifer sections as bufferV stiifened y glue for harder or coarser workA as in roug finishing wheel, and

Fig. 8 Ais a. view inside elevation parts bein broken `away of uniform crisscross stitc ingas supilemented by a spiral stitch- 0 in in a buffer isc section. lies lof fabriclmay be of canvas, cotton duck or other woven stock having warp and woof at90 from each other, the successive plies 1 'being shifted 45, approximately *5 such langle to givedissimilar direction to the threadsin the adjacent plies .and thereby render the plies less subject to similar fra ing. These plies ma be of different weig t stock and as assemb ed into discs 2 may be 5 in quantities of, say,- from 15 to 2O plies.

each. There may in'practice be variations .over or under this number of plies to meet vax'ying conditions of operation. .In use 65 bu ers may be subjected to arduous service,

even as to considerable grinding action un- `This ply 3 may mg or inding or polishing materials or compound;

These buiing discs have greater eiiiciency at higher speeds of operation. However, the frictional action tends to build up temperature, and to neutralize such a condition, there is incorporated in thediscs 2 of this dlsclosure as may be found desirable, `ply 3. in anassembly of, say, 16

plies, 1 to be placed between the 8th'- and 9th plies, and concentric therewith. The 4 impregnation of this ply 3 may be varied .to suit operating conditions. A desirable lubricant for the buffer ma be obtained by impregnating the ply 3 witlsi7 a compound of tallow, beeswax and paraiiine wax. This may be in equal proportions by -wei ht or other variation even to an excess parane to twice the quantity-of the tallow and 'beeswax. Such compound is used as a li uid by warming and the dipping thereinto. v

The discs 1,y 3, may be assembled, say'by central spiral anchoring stitching 4, to provide a hub region approximating washers 5 in diameter. The discs have central open- 1ngs 6, allowin the, discs to be moved alongA the shaft against washer 8 of similar size to washer 5, and the grouping of discs 2` fixed with the shaft7 by running disc 3 impregnate by nut 9 up on such shaft. This shaft 7 is v rotated belt 10 about pulle 11. The shaft 7 is shown as carried by earings 12 mounted on machine frame 13.

The real workin portion of the buffer is l that .re 'on beyon the stitching 4. With no stltc ing, at high speeds there is a tendency due to centrifugal force to have the i disc hold to a straight outward lane. The Agreater Ithe speed, the more rigi this holding, due to centrifugal force.

In practice with the holding of an article agamst they disc to be treate by the discs, say by incorporating with the rotating discsthe polishlng material, the holding up action is hardly suicient.. The discs are accordingly reas to sti'ening the discs at the outer region n of the disc 2. However, as the discs are rotated at high speed, the centrifugal force supplements this stitching 14, and a suiliciently rigid construction is provided. In practlce the discs fray out in operation and provide a loose face which may have the fra ed out stitches extend back, say 378 an the fraying material following thereupon. As the use of the buffer continues, its diameter is decreased as the stock wears away. This decreasing diameter of the buffer with a maintained speed for the shaft 7 means that there is a gradually decreased linear speed for the working `face of the bufer edges. Accordingly the centrifugal action for stiffening thebuliing face is decreasing in the disclosure herein. Actually there is not a decrease in the stiffness of .this buffer for the reason that the stitching 14 is greater per unit of extent of the bufling surface at the less radial distance. pockets 15, which, while decreasing in capacity, are still uniformly distributed and more 'numerous per unit of area of the buffer. The efficiency of this buil'er is maintained throughout its life and its life is one for wearing down of its stock in a complete use of the buiiing portion thereof.

Buing disc 16 has stitches 17 radial but more closely assembled than the stitches 14 of the disc 2, and accordingly pockets 18 between the stitchings 17 are smaller. The increased stitching per unit of area of the buiiing disc 16 means this disc may be operated at lower speeds, or be subjected t0 harderx usage at similar speeds than the disc 2. In practice these speeds of operation while in many cases running from 2,000 to 2,500 RQP. M. have also been used even up to 3,000 to 3,500 R. P. M. Disc 19 is shown as having arc stitching 20 therein for longer stitch travel than the direct radial stitches 14, 17. However, here there is still an endless annular series of similarpockets 21. Disc 22 instead of having curved stitching 20 is shown as having tangential stitching 23 providing similar pockets 24.

Disc section 25 is herein shown as having radial stitching 26 intersected by constant pitch spiral stitchin 27 to form shallow pockets 28 as .radi y open. This spiral stitching contributes uniformly to the stability or approximately uniformly to increasin the stiness of the disc section. The re atively shallow pockets 28 tend to hold the abrasive against travel inward and thereby the abrasive as a plied to the wheel is more economically de 'vered in disc operation;

In instances where even' additional rigidity is desired in section assembly, the disc sections 25 may have the face plies 29 thereof dipped in glue, and as so impregnated lies 29 of the sections 25 may be assembled into a relatively yhard wheel 30 whlch may carry even a coarse emery as the abrasive and stand up well thereunder for heavy roughing operations in metal finishing.

Bufling disc sectiony31 is shown as having increasing pitch spiral stitching 32. for less stiifening effect on the outeror high lineal speed portion, and closer stitching on the inner or less lineal speed portion. This stitching spiral is accordingly diverging. This disc 31 as so variably stitched by the spiral 32 may have strengthening stitching by supplemental stitches 33 or even by further stitching 34. These stitchings produce pockets 35 which are in peripheral series and shallow.

The buffers as herein disclosed may not only be self lubricated by incorporating the impregnated plies 3 therewith, but automatically compensate for maintained stiiness under varying radial speed conditions as the buffer wears down, but also have the polishing material holding'pockets uniform throughout the fray in each working diameter of the buffer. Remnants 36 may be used in piecing out the plies and in no way detract therefrom, while such is a factor of economy in production.

In the buildin up of glued buiiing wheels hereunder a bu g section may have a ply on one side thereof given a heavy coat of glue, a buing section placed thereover with the upper ply of said second section' given a heavy coat of glue as a li uid and this operation continued to the thic ess of builing wheel desired. The lower discs ma be laid upon a paper and a paper pla on the top of the upper The assembled sections may then be subjected to pressure and such ressure maintained for not only electing lmpregnation of the builing sections by forcing the glue through the needle holes along the lines of stitching as splral and intersecting as well as radlal, but as to any excess of such glue exuding such from the wheel.

After the pressure is released further seasoning by exposure to the air glves the wheel further stability. It is then ready to be centered for its arbor and then peripherally dressed down and glue coated for carryin the Iabrasive. These .wheels 'by their stitching not onlyprovlde substantial stiiening due to the intersectlng glue lines therethrou h but are substantial agalnst fraying an Wearing so that as an abraslve face has worn therefrom a redresslng may occur and a supplemental glue and abraslve tread ap lied to be repeated throughout the life of t e wheel. A further factor dueto this character of seaming is that there 1s practically no tendenc whatever for the ed es of this disc to rol as a glued disc.

is a buin disc without lue there is ten ency of the to roll. Furthermore there is no necesslty whatsoever to rake this disc in order to provide a builing face. Again in practice with the stitchlng extending outward, the threads of the stitching Wear down with the Wheel face. As to the intersecting stitching the threads are knotted or tied with each other by the crossovers so that there can in no instance herein be any unraveling of the stitching threads which might be freed, and

thrown from the disc, have a tendency to Wrap the Work and pull such from the operator, with danger to the operator, as well as the destruction of the article. This means that these Wheels are ei'ective for uniform operation with a minimum of danger incident thereto.

What is claimed and it is 1desired to secure by Letters Patent is 1.. A butling disc section embodying a plurality of concentric fiat plies' of fabric ad- 'jacently 'dissimilarly extending as to the fabric threads, a general assembling spiral stitching therefor, and additionally a pocket forming stitching voverlapping said spiral stitching.

2. A buffing disc section embodying con# centric fabric liat plies, stitching substantially concentric With the periphery of the wheel and intersecting stitching through said plies overlapping said arc stitching.

In Witness whereof I af'rix my signature.

FRANK L. YERGES. 

